Nut-lock.



E. THOMAS.

NUT LOCK.

APPLICATION FILED AUG. 6, 1912.

r 1,116,760. Patented Nov. 10, 1914.

caied in ail ihe riovw of im- EIDVARD 'IHQIVZAS, OE ALTON, ILLINGIS.

NUT-LOCK.

in avian.

Specification of Letters Patent.

Patented Km. 109, i914.

Application filed. August 6, 1912. Serial No. 713,633.-

To all w]: m it may; COIN/27% Be it kruiu'n that l, EDWARD iiiiiirams citizen of the United States, residing at Alton in the county of Illadison and State of illiiiois, have invented certain new and useful inipro'veinenis i in Kohl/locks, oi which the following: is a &-:pe-"ifi(atio1i.

My invention relates to new and useful impi ovemenis in out lot-he; and the ohjeet of my invention is to provide a nut loelc emhi'idying a paii' of -ailing nuts, one of which is: provided with a right-handed thread while he other is provided with a left'handecl thread, boihaiu'labeing mounted 1i [ion the same bolt.

A further hjeet oi my invention in to .=;o form the counting faces oithe nuts that the turning; of the outer out will cause it to'loek with the inner out and also prevent the turning of either nut in illllt'fil direetion.

A still, further ohjw-t ol my invention is to provide a novel fo m of ooh for use with the ahove deserihed ooh: inrludiiifi' a shank portion provii'led rxiih a '1-"l '.i --lllllliiil either right or left-handed and having a redueed terminal provided with an ogworaitoly formed thread. the pih-h o! ilw uaid latter thread heing greater lhuu i'hal oi the former.

With thew and other ohjw-i in view, my invention will he more tullv il rihed. illu traied in illi' awroinpau vmy drau'ii'ig and then s n i J-Plilll'd out in the elaizu which i, i. tariurd lo and lorzow a part hi this appliealion.

. hui'lv s ow iaH-ut th reduced m l provided with an olil onilolv l'oruud sti'rvuidliroad i l. The

piti-h of the lhrrad if: in prei'rral l greater than that of the thread i i. no ;-hown in Fig.

(loaufiing with this bolt, is a pair of nuts 5 and 16 whioh are identieal in size and :hape and the former of which is provided with a threaded bore 17 for engageu'ieut with the threaded portion 14 of the bolt, while the -alter is provided with a threaded bore 18 which engages with the portion 13 of the bolt.

One face of each of the nutslh and 16 is dished as shown at 19 in Fig. 3. That is, the face is eoneaved both hingitudinally and transversely. in applying the nuts to the holt, the nut is turned into place upon the threaded portion 14 of the bolt with its (lit-shed face directed outwardly. The nut 16 is then threaded upon the reduced portion 12 of the holt with its dished face directedinwardly until it engages with the nut 15.

i s will he apparent from Figs. 1 and 2 of the drawing, the corner portions ol the nuts are thither than the central portions and when. the nuts are to he looked in place the outer nut is turned to 'l'oree its (-orner portions past the adjacent corner portions ()1 the nut 15. (lonsidorahle force is re quired to aeeoiuplish this and it will, therefore. he impossible for the nuts'to work hack out of this engagement.

As the nuts are reversoly threaded, any tendency upon the part of one to turn in either direction is eounterarted hy the other, the two being locked together and one being adapted "for movement in one direetion, while the othei: is adapted for iuoven'ient ll; the opposite mreetioii.

With the outer threads, that is the threads won the reduced portion oi" the belt, of.

greater pitrlwthau the inner threads or thread. upon the lllll'('llll(t,(l portion, the two threads being LFl'U-I'StlY formed, the outer nut may he readily removed hy simultaneously turning hoth nuts in a direction to tighten the inner out in order to move the nuts away from each other and permit disaengagzuiuent ol' il :ir iuterloeking corners. This simultaneous turning of hot-h nuts in the same direction, muses them to move away from eaeh other through a distance e uai to a l'raotional art of the pitch of lioth threads. the relative fineness ol the inner threaded shaul the inner nut is notappreciably .ftightened during sueh turning of the nuts. after the nuts thus been separated, the outer nut separately turned and so At. thisame time, because of rei'noved from the shank of the nut, after which the inner nut is removed.

F r0111 the 'toregoing description it Will be apparent that I have provided an extremely simple and efiicient form of lock nut and one which may be employed for all kinds of Wc-rk as it does not require the forming of any sockets in the bodies being boiteci together, or the attachment of any auxiliary looking plates or springs.

. Having thus described the invention what is claimed as new is A nut lock including a bolt provided with a reduced terminal having screw threads, the shank of the bolt being reversely thread ed, the thread of the reduced portion being of greater pitch than the thread of the shank portion, a nut three ded to engage with the threaded portion 01' the shank, and a second nut equal in size and shape to the first threaded to engage with the reduced portion of the shank the opposed faces of the nuts being dished to provide extending corners for interlocking engagement.

In testimony whereof I aflix my signature in presence of two witnesses.

EDWARD THOMAS. [L. 5.] Witnesses R. M. NATHAN, MARY Tnonmsu 

